According to the present invention, a skin treatment apparatus comprises: a plurality of needles each of which has a sharp end； a needle-fixing unit in which the plurality of needles are fixed； a driving unit for directly or indirectly transferring a force to the needle-fixing unit such that the plurality of needles fixed in the needle-fixing unit are inserted into the skin； and an electrical-energy transfer unit which is electrically connected to the plurality of needles. The electricity applied to the apparatus is alternating current； the electrical energy has a high frequency； the plurality of needles have a bipolar electrode system； and the area of the skin treated by the thus-configured apparatus achieves the appearance of being burnt by a Ra-effect or Ra plus-effect.
